route类中检测真实的uri

//detect true URI, inspired bu CodeIgniter 2

    private static function detect_uri()
    {
        $uri = $_SERVER[‘REQUEST_URI‘];
        if (strpos($uri, $_SERVER[‘SCRIPT_NAME‘] === 0)) {
            $uri = substr($uri, strlen($_SERVER[‘SCRIPT_NAME‘]));
        }elseif (strpos($uri, dirname($_SERVER[‘SCRIPT_NAME‘])) === 0) {
            $uri = substr($uri, strlen(dirname($_SERVER[‘SCRIPT_NAME‘])));
        }
        if ($uri == ‘/‘ || empty($uri)) {
            return ‘/‘;
        }
        $uri = parse_url($uri, PHP_URL_PATH);
        return str_replace(array(‘//‘,‘../‘), ‘/‘, trim($uri,‘/‘));
    }